Answer:
Smaller impurity atom will nullify some of the compressive strain of a dislocation in a crystal. Because, smaller impurity atoms located near a dislocation creates tensile strain on atoms around it thereby partially nullifying compressive strain at the dislocation.
Answer:
Value of Young's modulus is obtained as
Explanation:
We know from the basic stress strain relationship
Stress is obtained as
now the strain is obtained as
using these values in the above equation we obtain E as
Answer:
The steps in Buckingham π method are as follows:
Step 1: List the all variables = m
Step 2 : Express each variables in fundamental units (M,L,T,θ) = n
Step 3 :Find m- n numbers of π terms
Step 4 :Select repeating variables which have all basic dimensions.
Step 5 : Creates π terms.
Step 6 : Repeat step 5 for all other variables.